Why did the AI sign some of my draft prospects and then add them to my RL roster?

A.

If your RL roster is not complete (at least 25 players), the AI will sign enough of your draft prospects to fill out the roster. Before the AI does anything though, you will receive an email a few days before RL is scheduled to begin. This email warns you that RL will be starting soon and you should make sure your roster is complete, otherwise the AI will sign the draft picks.